Device Register; Error Register; Features Register; Lba High Register - Hitachi HTS542516K9SA00 Specifications

The host must set RST=1 and wait for at least 5 microseconds before setting RST=0, to
ensure that the device recognizes the reset.
-IEN Interrupt Enable. When IEN=0, and the device is selected, device interrupts to the host will
be enabled. When IEN=1, or the device is not selected, device interrupts to the host will be
disabled.

11.4 Device Register

7 6
- L

Table 26 Device Register

This register contains the device and head numbers.
Bit Definitions
L Binary encoded address mode select. When L=0, addressing is by CHS mode. When L=1,
addressing is by LBA mode.
The HS3 through HS0 contain bits 24-27 of the LBA. At command completion, these bits are
HS3,HS2,HS1,HS0
updated to reflect the current LBA bits 24-27.

11.5 Error Register

7 6
CRC UNC

Table 27 Error Register

This register contains status from the last command executed by the device, or a diagnostic code.
At the completion of any command except Execute Device Diagnostic, the contents of this register
are valid always even if ERR=0 in the Status Register.
Following a power on, a reset, or completion of an Execute Device Diagnostic command, this register
contains a diagnostic code. See "Table 31 Diagnostic Codes" for the definition.
Bit Definitions
ICRCE (CRC) Interface CRC Error. CRC=1 indicates a CRC error has occurred on the data bus during a
Ultra-DMA transfer.
UNC Uncorrectable Data Error. UNC=1 indicates an uncorrectable data error has been
encountered.
ID Not Found. IDN=1 indicates the requested sector's ID field could not be found.
IDNF (IDN)
Aborted Command. ABT=1 indicates the requested command has been aborted due to a
ABRT (ABT)
device status error or an invalid parameter in an output register.
TK0NF (T0N) Track 0 Not Found. T0N=1 indicates track 0 was not found during a Recalibrate command.
AMNF (AMN) Address Mark Not Found. AMN=1 indicates the data address mark has not been found after
finding the correct ID field for the requested sector.
This bit is obsolete.

11.6 Features Register

This register is command specific. This is used with the Set Features command, S.M.A.R.T. Function
Set command and Format Unit command.

11.7 LBA High Register

This register contains Bits 16-23. At the end of the command, this register is updated to reflect the
current LBA Bits 16-23.
Device Register
5 4
- 0 HS3
Error Register
5 4
0 IDNF
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5K250 (SATA) OEM Specification
3 2
HS2 HS1
3 2
0 ABRT TK0NF
1 0
HS0
1 0
AMNF